Frequencies for first 10,000 rows of admtphys variable in nhamcsed2013 dataset :

      Admitting |
      physician |      Freq.     Percent        Cum.
----------------+-----------------------------------
          Blank |         32        0.32        0.32
 Not applicable |      8,846       88.46       88.78
    Hospitalist |        480        4.80       93.58
Not hospitalist |        249        2.49       96.07
        Unknown |        393        3.93      100.00
----------------+-----------------------------------
          Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016